There will be another Amazon tablet coming at some point. You don’t find the success that Amazon has found with the Kindle Fire, and just leave it at that. The biggest questions, then, are: when will it arrive, and how big will it be? A report out of alleged supply chain sources claims to have answers to both of those questions.

China Times is saying that Amazon is planning for the second-generation of its tablet. It says that it will hit production in May or June, followed by a mid-year (end of Q2) release.

The report also drops the bomb that Amazon will be building the second-generation version of the tablet to be profitable. Confused? The Kindle Fire’s initial sale essentially has Amazon breaking even; sales of Amazon’s digital and retail content are where the real profit lies. If this report has legs, though, Amazon will be shifting strategy and moving in a direction that’s more like Apple, (and other tablet manufacturers) for the second-gen Fire.

The report also mentions that it expects a 10-inch version of the Kindle Fire to be coming later this year. We’ve heard this before, but this would also tie in to the shift in profit. If Amazon wants to sell a version of the Kindle Fire that more directly competes with the iPad, it’s going to have a harder time doing so by loading it with Amazon promotional content. That can fly on a $200 color e-reader, but a full-sized tablet packed with Amazon content might look ridiculous next to the iPad 3.

Perhaps Amazon intended this all along, and saw the first-generation of the Fire as an “in” to create customer trust and brand recognition. Now that the Kindle Fire has been established, the company is in better position to offer a full tablet experience that competes with the iPad.

Of course this is all rumor and speculation at this point. There will be another Kindle tablet coming along, but that’s all we know for sure. In other words, we wouldn’t hold off on other tablet purchases (like next month’s iPad 3) because of an impending 10-inch Kindle tablet that may not exist.